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Bsa m20 - detachable tail piece

Hi
I had thought there to be only 2 types of tail piece section

However, it seems that there are 3 - perhaps ?
1/ tail piece with short rib
2/ tail piece with longer rib
3/ tail piece with flat section

Has anyone got information on this long rib section tail piece which I think was used sometime in 41/42

I have no parts list from this period to compare with others

Br
Jo’b

email (option): jonnyob1@googlemail.com

Re: Bsa m20 - detachable tail piece

I think you're just down to trying to clarify the changes with anecdotal information on this one as all the parts lists I have show the same part number for the mudguard tail.....Here's a representative selection....Ian
1940.. C6126
Late 1942- late 43.. S1048
Late 1944 - Jan. 46 (last contract)..S7218
All these have the same part number listed..66-6941

email (option): ian@wright52.plus.com

Re: Bsa m20 - detachable tail piece

Hi Ian
Not anectdotal no
I have the flat section & the short rib section here myself

The oddball rib version - which I got from a broken Australian bike - has the longer rib

A friend here ended up with it from me & has had issues with fitting the correct pattern no plate
The flat section where the plate mount would be expected to be affixed - is occupied by am elongated rib section

The tail section itself came from a military bike & has 3 holes lower downwhich I think lines up with the Mid war tail light holder associated with 2941/42 machines

Consequently- am looking for a correct pre / war tailpiece suited to a valence rear mudguard - anyone ?

Br
Job

email (option): jonnyob1@googlemail.com

Re: Bsa m20 - detachable tail piece

My meaning was any information about when these various types were fitted would be anecdotal, not the fact they exist, as the part numbers don't help in identifying the dates of those changes...Ian:relaxed:

email (option): ian@wright52.plus.com

Re: Bsa m20 - detachable tail piece

I'm after a tail piece for a valanced guard too, John. The only ones I've seen have the short rib -around 2"?

Re: Bsa m20 - detachable tail piece

Hi Craig
That’s correct
The 2” or do rib allows the rest plate to be mounted on a flat surface
The one here is longer & unless the No plate is pressed to accommodate the mudguard rib - it can’t really be used

Our search continues
Jo’b

email (option): jonnyob1@googlemail.com

Re: Bsa m20 - detachable tail piece

Hi John,

Just been looking at this video on youtube. Something that my be of interest at 1.43.
Hope this helps.
https://www.youtube.com/watch?v=Sn6_qeCvGPE

Dave

email (option): jeepfinger@blueyonder.co.uk

Re: Bsa m20 - detachable tail piece

Thanks Dave
I can look at this when home tomorrow evening
BR
John

email (option): jonnyob1@googlemail.com

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